OKCon, now in its fifth year, is the interdisciplinary conference that brings together individuals from across the open knowledge spectrum (such as also DBpedia in particular and Linked Open Data in general) for a day of presentations and workshops.Open knowledge promises significant social and economic benefits in a wide range of areas from governance to science, culture to technology. Opening up access to content and data can radically increase access and reuse, improving transparency, fostering innovation and increasing societal welfare.